If you had the choice to buy only one of the two today which 1 would it be?
Monero or LTC? don't really need brains to decide on this

For me, it is very simple.
LTC is a Bitcoin clone (without any new features) supported only by chinese people.
Monero has a very high asking feature : the anonimity : this feature will be a very important one in the next years.
Then, my choice with no doubt : Monero.